[kuh-lat-er-uh l]
  1. security pledged for the payment of a loan: He gave the bank some stocks and bonds as collateral for the money he borrowed.
  2. Anatomy.
    1. a subordinate or accessory part.
    2. a side branch, as of a blood vessel or nerve.
    3. collateral circulation.
  3. a relative descended from the same stock, but in a different line.
  1. accompanying; auxiliary: He received a scholarship and collateral aid.
  2. additional; confirming: collateral evidence; collateral security.
  3. secured by collateral: a collateral loan.
  4. aside from the main subject, course, etc.; secondary: These accomplishments are merely collateral to his primary goal.
  5. descended from the same stock, but in a different line; not lineal: A cousin is a collateral relative.
  6. pertaining to those so descended.
  7. situated at the side: a collateral wing of a house.
  8. situated or running side by side; parallel: collateral ridges of mountains.
  9. Botany. standing side by side.

Origin of collateral

1350–1400; Middle English (< Anglo-French) < Medieval Latin collaterālis, equivalent to col- col-1 + laterālis lateral
Related formscol·lat·er·al·i·ty [koh-lat-uh-ral-i-tee] /koʊˌlæt əˈræl ɪ ti/, col·lat·er·al·ness, nouncol·lat·er·al·ly, adverb Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

British Dictionary definitions for collate-rally


    1. security pledged for the repayment of a loan
    2. (as modifier)a collateral loan
  1. a person, animal, or plant descended from the same ancestor as another but through a different line
  1. situated or running side by side
  2. descended from a common ancestor but through different lines
  3. serving to support or corroborate
  4. aside from the main issue
  5. uniting in tendency
Derived Formscollaterally, adverb

Word Origin for collateral

C14: from Medieval Latin collaterālis, from Latin com- together + laterālis of the side, from latus side
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Word Origin and History for collate-rally



late 14c., "accompanying," also "descended from the same stock," from Old French collateral (13c.), from Medieval Latin collateralis "accompanying," literally "side by side," from Latin com- "together" (see com-) + lateralis "of the side," from latus "a side" (see oblate (n.)). Literal sense of "parallel, along the side of" attested in English from mid-15c. Related: Collaterally.



16c., "colleague, associate," from collateral (adj.). Meaning "thing given as security" is from 1832, American English, from phrase collateral security (1720).

Online Etymology Dictionary, © 2010 Douglas Harper

collate-rally in Medicine


  1. Indirect, subsidiary, or accessory to the main thing.
  2. Having an ancestor in common but descended from a different line.
  1. A branch of a nerve axon or blood vessel.
  2. A collateral relative.
Related formscol•later•al•ly adv.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.

collate-rally in Culture


Property or its equivalent that a debtor deposits with a creditor to guarantee repayment of a debt.

The New Dictionary of Cultural Literacy, Third Edition Copyright © 2005 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.